.bg{
    width: 100%;
    height: 100%;
    /*border: 1px solid rebeccapurple;*/
}
.certification_content{
    width: 600px;
    height: 400px;
    /*border: 1px solid red;*/
    margin: auto;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}
.header_img{
    width: 140px;
    height: 140px;
    /*border: 1px solid red;*/
    border-radius: 100%;
    margin: 0 auto;
    background-color: #F4F4F4;
}
.header_img img{
    width: 140px;
    height: 140px;
    /*border: 1px solid red;*/
    border-radius: 100%;
    margin: 0 auto;
    background-color: #F4F4F4;
}
.certification_td{
    width: 600px;
    /*border: 1px solid rosybrown;*/
    margin: 0 auto;
    text-align: center;
    margin-top: 30px;
    line-height: 26px;
}
.ch{
    line-height: 20px;
    margin-bottom: 13px;
    font-size: 16px;
}
/*.as{*/
    /*color: white;*/
    /*margin: 0 auto;*/
    /*line-height: 20px;*/
    /*font-size: 16px;*/
    /*width: 200px;*/
    /*margin-top: 50px;*/
/*}*/

